Your question is too general, every variety of medical equipment have a good brand of sales, can only say a little.
Large equipment:Philips, GE, Siemens, Varian, ....... and so on.
Small and medium-sized equipment: Olympus, Leica, Foton, photoelectricity, Myriad, Johnson & Johnson, Omron ........ etc.
High-value consumables: Medtronic, St. Jude, Biotronik ...... etc.
General medical consumables:Vigor, Piaoan ....... etc.